XGY   Grimsby Mountain, ON Weather Observed At   43-11  N    79-34  W

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2026-07-28	4:15pm			Max		Min
Weather		----
Temperature		25.1 °C		27.1 °C	2:25pm	19.7 °C	4:00am
Relative Humidity		69 %		95 %	6:07am	65 %	3:09pm
Dew Point		19.0 °C		21.7 °C	12:13pm	18.9 °C	3:00am
Wind Velocity		360 ° at  4.8 G 11.3 kt		11.3 kt	3:54pm
Pressure		29.632 "  ↑		29.660 "	12:33am	29.569 "	5:37am
Rainfall Rate		0.0 mm/h		164.6 mm/h	3:34am
Snow On Ground		0 cm
Brightness / Darkness		264 W/m² /  0.00 m/"²		851 W/m²	1:08pm	18.28 m/"²	4:17am
Remarks

Rainfall	Today	54.8 mm	Storm Total	58.8 mm
Snowfall	Today	0.0 cm	Storm Total	0.0 cm

Evapotranspiration

Today

-3.35 mm

Lake Conditions

Water Temperature  24.4 °C

Waves  CALM

ICE FREE

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Meteor Index	74   Perseids
Aurora Index / Solar	13   Quiet   - 3 nT	Solar Flux   147  sfu  /   S 0    G 0    R 0   /  MUF   26.9 MHz

Sunrise	6:05am	Sunset	8:44pm
Moonrise	N/A	Moonset	N/A	Moon Phase	Full Moon

Grimsby Mountain Weather Maps
Local	Regional	Area	Synoptic
updated H+09 and every 10m	updated H+19 and H+49	updated H+19

Ontario 6-Hour Meteorological Summary

Canadian 6-Hour Meteorological Summaries

CLIMAT Data
Official	Yesterday					2004	2005	2006	2007	2008	2009	Normals & Records
		2010	2011	2012	2013	2014	2015	2016	2017	2018	2019
		2020	2021	2022	2023	2024	2025	2026

Grimsby Mountain Charts

	Sky Quality (Darkness) Meter courtesy of

              

Wx Map	Sat Pix	IR Sat Pix	Radar	Lightning
	Water	Ice

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  This is a privately operated weather station that is part of the Meteorological Service of Canada's official observing network.
Permission to publish the weather statistics found on this website is not required.
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